Lemon Blueberry Biscuits

2 c flour
1/3 c sugar
2 t baking powder
1/2 t baking soda
1/4 t salt
8 oz lemon yogurt
1 egg - lightly beaten
1/4 c melted margarine
1 t grated lemon peel
1 c blueberries - fresh or frozen

Glaze:
1/2 c powdered sugar
1 T lemon juice
1/2 t grated lemon peel

Lightly mix all biscuit ingredients - just until blended. Drop by the tablespoon onto greased bakng sheet. Bake at 400 degrees for 15 - 18 minutes. Drizzle with glaze when cool.